Description

Reactive Blue 4 is a reactive anthraquinone dye known for its bright blue color and covalent bonding capability with cellulosic fibers. This product is essential for achieving vibrant, wash-fast coloration in textile manufacturing processes. It is primarily used by dye houses and textile mills specializing in cotton, viscose, and other cellulose-based fabrics.

Application

• Textile Dyeing: Primary application for dyeing cotton, rayon, linen, and other cellulosic fibers.
• Exhaust Dyeing: Suitable for batch dyeing processes in jiggers, winches, and jet machines.
• Continuous Dyeing: Used in pad-batch and pad-steam continuous dyeing ranges.
• Yarn Dyeing: For coloring cotton yarns and threads with excellent fastness properties.
• Union Dyeing: Effective for dyeing blends of cellulose with synthetic fibers under specific conditions.
• Research & Development: Serves as a reference standard or starting material in dye chemistry research.

Basic Information

Product Name	Reactive Blue 4
CAS No.	13324-20-4
Molecular Formula	C23H14Cl2N6O8S2
Molecular Weight	637.42 g/mol
Synonyms	Reactive Blue 4; Procion Blue H-5G; C.I. Reactive Blue 4; Remazol Brilliant Blue R; Levafix Brilliant Blue E-B; Drimarene Brilliant Blue K-2RL; Anthraquinone blue reactive dye; 1-Amino-4-[3-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-4-sulfophenylamino]anthraquinone-2-sulfonic acid
EINECS	236-349-5

Quality Control

Our Reactive Blue 4 is manufactured under strict quality management systems. Every batch undergoes comprehensive testing for critical parameters including color strength, shade, solubility, and reactive group content to ensure batch-to-batch consistency and performance in your application. A Certificate of Analysis (COA) detailing purity, physical properties, and application test results is provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents and incompatible materials.

Specification

Item	Specification
Appearance	Dark blue powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
pH (1% Solution)	6.0 - 8.0
Shade on Cotton	Conforms to standard
Fastness Properties	Wash Fastness: ≥ 4; Light Fastness: ≥ 5

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.